The Hollywood couple were joined by an array of A-List guests at the luxurious Carondelet House.

They arrived roughly an hour after the party's guests, which included Marilyn Mason, Steven Tyler, Jerry Bruckheimer, Mandy Moore, Ryan Adams, and Andy Garcia, to name a few, and greeting them all around 9pm.

Also attending the party were Johnny's mother Betty Sue Palmer, and his longtime tattoo artist, Mark Mahoney.

An insider told Us Weekly that the future bride wore a white-silk, spaghetti-strap "vintage dressy" attire, while wearing her blonde hair down.

The 'Pirates of the Caribbean' star sported a much simpler casual black suit with a matching top hat.

Arriving with the pair were Heard's sister and Depp's 11 year-old son, Jack, along with Vanessa Paradis, Johnny's ex-partner.

Another source told E!News that the party's invites wear in a black envelope with the initials 'A' and 'J' printed on them, with a golden ticket inside.

There was a rather large group of security personnel gathered outside the venue to stop and block the paparazzi that had gathered outside.